222021219977 has 2 divisors, whose sum is σ = 222021219978. Its totient is φ = 222021219976.

The previous prime is 222021219919. The next prime is 222021220021. The reversal of 222021219977 is 779912120222.

It is an a-pointer prime, because the next prime (222021220021) can be obtained adding 222021219977 to its sum of digits (44).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172444189696 + 49577030281 = 415264^2 + 222659^2 .

It is a cyclic number.

It is not a de Polignac number, because 222021219977 - 2¹² = 222021215881 is a prime.

It is not a weakly prime, because it can be changed into another prime (222021219377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111010609988 + 111010609989.

It is an arithmetic number, because the mean of its divisors is an integer number (111010609989).

Almost surely, 2^222021219977 is an apocalyptic number.

It is an amenable number.

222021219977 is a deficient number, since it is larger than the sum of its proper divisors (1).

222021219977 is an equidigital number, since it uses as much as digits as its factorization.

222021219977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The spelling of 222021219977 in words is "two hundred twenty-two billion, twenty-one million, two hundred nineteen thousand, nine hundred seventy-seven".